Beginning Rails 3 Workshop - Episode 2 - Active Record

Rida Al Barazi, co-author of Beginning Rails 3 will be hosting the second workshop in a series dedicated to getting Ruby on Rails beginners up to speed. This workshop will focus on ActiveRecord, the default ORM provided with Ruby on Rails. The night will begin with a presentation about ActiveRecord, followed by a hacking session on a problem to fully grasp the concept. Be sure to bring your laptops to participate!

Transcript

1. Beginning Rails 3 Workshop Rida Al Barazi Ruby Brigade Toronto
2. About Me • Ruby on Rails Developer • Beginning Rails 3 Book • Working at NuLayer Inc. • me@rida.me • rida.me
3. Recap • MVC • Rails Components
4. Rails Components •ActiveRecord - Model •ActionView - View •ActionController - Controller
5. Database •database.yml •Different Adapters •Default: sqlite3
6. Active Record •What is ActiveRecord •Active Record Pattern •ORM
7. Active Record •Generate a model •“rails generate model”
8. Model Generator •Model •Test •Migration
9. Model Generator •Model •Test •Migration
10. Migrations •Database versioning •Written in Ruby •rake db:migrate
11. Migration Generator •“rails generate migrations”
12. CRUD •Create •Read •Update •Delete
13. Create •Article.new •Article.create
14. Read •Article.first •Article.all •Article.find •Article.scoped
15. Update •article.save •article.update_attribute •article.update_attributes
16. Delete •article.destroy •Article.delete
17. Accessory methods •count •sum
18. Finding •where •find_by_#{attribute}
19. Validations •validates: •presence •uniqueness •length
20. Associations •has_one •has_many •belongs_to •has_and_belongs_to
21. Scopes •scope •where •lambda •belongs_to •has_and_belongs_to
22. Callback •before_create •after_create •before_save •after_save •before_destroy •after_destroy
23. Live Example
24. • Beginning Rails 3 Book • irc: #torontoruby on freenode Resources